Hybrid model development emulating linear polarization resistance method towards optimizing dosages of corrosion inhibitors

ChemRxiv

Abstract

Models that have been developed for optimizing dosages of a corrosion inhibitor are based on corrosion inhibition efficiencies quantified using costly and time-consuming measurements. The current study proposes a methodology for using corrosion data regularly generated from cooling water circuits of large-scale chemical plants to analyse corrosion mechanisms, predict the corrosion rate, and to potentially optimise dosages of multiple corrosion inhibitors. The hybrid model was developed based on an adaptation of the Butler-Volmer equation. Butler-Volmer parameters such as the anodic charge transfer coefficient were modeled as nonlinear functions of a single component of partial least squares (PLS), containing inhibitor concentrations. A suitable indicator of corrosion inhibition efficiency was identified from the model. Adequately capturing the relationship between inhibitors and the corrosion rate facilitates optimizing dosages of corrosion inhibitors using daily recorded data, without heavily relying on case-specific models and experiments.

Authors 9

1. Chamanthi Denisha Jayaweera

   Ghent University

   Affiliation as printed

   Ghent University

2. Ivaylo Plamenov Hitsov

   Ghent University

   Affiliation as printed

   Ghent University

3. David Fernandes del Pozo

   Ghent University

   Affiliation as printed

   Ghent University

4. E. De Ketelaere

   Ghent University

   Affiliation as printed

   Ghent University

5. Tom Depover

   Ghent University

   Affiliation as printed

   Ghent University

6. Sarah Isabell Müller Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University

7. Thomas Diekow
   Affiliation as printed

   Dow Olefinverbund GmbH

8. Arne R. D. Verliefde

   Ghent University

   Affiliation as printed

   Ghent University

9. Ingmar Nopens

   Ghent University

   Affiliation as printed

   Ghent University